A report on the first phase of research into the possible benefits of truck platooning technologies showed that all trucks in a platoon gained fuel efficiencies, with the lead truck gaining as much as a 5 percent improvement while the trailing truck got up to 10 percent improvement.

Peterbilt has introduced two new medium-duty vehicles -- the Model 337 and the Model 348 -- powered by compressed natural gas (CNG). Both vehicles are in production and can be configured as trucks or tractors.